Automatic unglazed brick wear resistance tester

Abstract

The utility model discloses an automatic tester for the wear resistance of unglazed bricks. The tester comprises a controller, a servo motor, a friction steel wheel, a lead screw guide rail linear module, a grating ruler and a clamp which are arranged on a workbench, a driving shaft of the servo motor is connected with the friction steel wheel through a belt and used for driving the friction steel wheel to rotate. The clamp is installed on a sliding block of the lead screw guide rail linear module, and the grating ruler is arranged on the side of the clamp, connected with the sliding block of the lead screw guide rail linear module and used for driving the clamp to drive the test piece and the grating ruler to move towards the friction steel wheel at the same time. A feeding opening is formed in the lower portion of the grinding bin and located over the tangent direction of the friction steel wheel; the servo motor, the lead screw guide rail linear module and the grating ruler are all connected to a controller. The ground depth of the test piece is directly measured through the grating ruler, the controller reads the ground depth, the grinding volume is automatically calculated, the final conclusion is automatically obtained, and errors caused by manual measurement through a vernier caliper and tedious manual calculation are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of building material performance testing equipment, in particular to an automatic unglazed brick wear resistance tester. Background Art

[0002] Ceramic tiles are plate-shaped or block-shaped ceramic products made of clay and other inorganic non-metallic raw materials through molding, sintering and other processes. They are used to decorate and protect the walls and floors of buildings and structures, and are widely used. According to data, China's annual output of ceramic tiles is about 9 billion square meters, accounting for about 50% of the world's total output. Ceramic tiles are divided into unglazed ceramic tiles and glazed ceramic tiles according to surface properties. Unglazed ceramic tiles have the characteristics of hardness, wear resistance, high hardness, high strength, impact resistance, durability, and low water absorption. They are widely used in indoor and outdoor floors and walls of residences, shopping malls, hotels, restaurants, playgrounds, conference halls, and exhibition halls. According to the technical requirements of relevant product standards, one of the important indicators of unglazed ceramic tiles is wear resistance. If the wear resistance is not good, the surface of unglazed tiles is prone to scratches and wear during use, affecting the decorative effect. The unglazed tile wear resistance tester is an instrument used to test the surface wear resistance of unglazed ceramic tiles. The unglazed tile wear resistance tester is made according to the national standard GB / T 3810.6-2016 "Ceramic tile test method Part 6: Determination of wear depth of unglazed tiles" and other relevant clauses. The accuracy of the unglazed tile wear resistance tester is related to the quality of the tile wear resistance test. At present, the instrument and related standards have been widely used in the industry.

[0003] The unglazed brick wear resistance tester is mainly based on simulating the friction of unglazed bricks in actual use environment, and measures the wear resistance of unglazed bricks by measuring the chord length and calculating the worn volume. The structure of the existing common unglazed brick wear resistance tester is as follows Figure 1 The working principle of the current instrument is to use the balance hammer 12 to drive the test piece 100 close to the friction steel wheel 5, manually control the outlet of the abrasive bin 3 to make the abrasive fall and sprinkle into the contact point between the test piece 100 and the friction steel wheel 5, and the friction steel wheel 5 rotates and rubs the test piece 100. After grinding the test piece (unglazed brick) 100 for 150r, remove the test piece 100, measure the chord length of the test piece 100 with a vernier caliper, and then calculate the volume of the test piece ground. The size of the volume can reflect the wear resistance of the test piece (unglazed brick) 100. Figure 2 As shown, the calculation formula for the volume to be ground is as follows:

[0004]

[0005]

[0006] Where:

[0007] α——the central angle of the chord to the friction steel wheel, in degrees (°);

[0008] h——the thickness of the friction steel wheel, in millimeters (mm), the standard value is 10mm;

[0009] d——friction steel wheel diameter, in millimeters (mm), standard value is 200mm;

[0010] L——grinding string length, in millimeters (mm);

[0011] The key parameters for the accuracy of the unglazed tile wear resistance tester are the friction steel wheel diameter, friction steel wheel thickness, friction steel wheel speed, friction steel wheel clamping force, and abrasive material feeding speed. The friction steel wheel diameter, friction steel wheel thickness, friction steel wheel speed, and friction steel wheel clamping force are currently determined by the manufacturer when leaving the factory. The friction steel wheel clamping force is currently generated by a balance hammer (weight). The feeding speed of the abrasive material is adjusted by the tester manually adjusting the size of the funnel opening, which has a great impact on the accuracy of the unglazed tile wear resistance tester.

[0012] The existing unglazed brick wear resistance test equipment has the following four disadvantages:

[0013] 1. The national standard GB / T3810.6-2016 "Ceramic Tile Test Methods Part 6: Determination of Wear Depth of Unglazed Tiles" requires an abrasive feed rate of 100g / 100r±10g / 100r. In fact, current instruments rely on manual adjustment of the funnel opening, which is actually extremely difficult to meet national standard requirements.

[0014] 2. The existing method of clamping the test piece and the friction steel wheel is to pull the balance hammer (weight) through the pulley. In actual work, as the grinding work proceeds, the falling abrasive will fall on the weight, causing the weight to become heavier and heavier. In addition, the clamping force generated by the weight is also affected by various factors such as whether the work surface is level and the friction force.

[0015] 3. The current test method is to grind the specimen (unglazed brick) for 150r, remove the specimen, measure the length of the chord of the specimen, and then calculate the volume of the specimen ground. The chord length of this method is measured with a vernier caliper, which is not accurate enough and the calculation process is cumbersome.

[0016] 4. Abrasive dust may affect the health of users. Utility Model Content

[0017] The technical problem to be solved by the utility model is to provide an automatic unglazed brick wear resistance tester.

[0018] The utility model is achieved in this way:

[0019] An automatic unglazed brick wear resistance tester, comprising: a workbench, a controller, an abrasive bin, a servo motor, a friction steel wheel, a lead screw guide linear module, a grating ruler, and a fixture;

[0020] The controller, the servo motor, the friction steel wheel, the lead screw guide linear module, the grating ruler, and the fixture are arranged on the workbench;

[0021] The driving shaft of the servo motor is connected to the friction steel wheel through a belt, so as to drive the friction steel wheel to rotate;

[0022] The fixture is installed on the slider of the screw guide linear module, and the grating ruler is arranged beside the fixture and connected with the slider of the screw guide linear module, and is used to drive the fixture to drive the test piece and the grating ruler to move toward the friction steel wheel at the same time;

[0023] A feed port is provided below the abrasive bin, and the feed port is located directly above the friction steel wheel in the tangential direction;

[0024] The servo motor, the lead screw guide linear module, and the grating ruler are all connected to the controller.

[0025] Furthermore, a weighing sensor is provided under the table top of the workbench, and the weighing sensor is connected to the abrasive bin located above the friction steel wheel through a column; the feed port below the abrasive bin is connected to an electric valve; the weighing sensor and the electric valve are both connected to the controller.

[0026] The advantages of the utility model are:

[0027] 1. The utility model clamps the test piece to the friction steel wheel through a fixture driven by a screw guide linear module. The screw guide linear module operates in a constant torque mode to ensure that the clamping force is long-lasting and stable, avoiding the influence of existing abrasives on the weight of the weight and avoiding the influence of the horizontal angle of the friction force.

[0028] 2. The utility model directly measures the grinding depth of the test piece through a grating ruler, and the controller reads the grinding depth, automatically calculates the grinding volume, and automatically draws the final conclusion, avoiding the errors caused by manual measurement with a vernier caliper and the tediousness of manual calculation.

[0029] 3. The utility model device can automatically test the wear resistance of unglazed bricks, reducing the degree of human involvement.

[0030] 4. The utility model reads the real-time weight of the weighing sensor through the controller, uses an electric valve to control the funnel opening, and automatically controls through the PID algorithm to ensure that the abrasive is fed at a speed of 1g / r. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0032] Figure 1 It is a schematic diagram of the structure of an unglazed brick wear resistance tester in the prior art.

[0033] Figure 2 It is a parameter diagram in the prior art formula for calculating the volume to be ground.

[0034] Figure 3 The utility model is an explosion diagram of an unglazed brick wear resistance tester.

[0035] Figure 4 It is a schematic diagram of the structure of the unglazed brick wear resistance tester of the utility model.

[0036] Figure 5 It is a parameter diagram in the calculation formula of the ground volume of the utility model.

[0037] Reference numerals:

[0038] 100-test piece, 1-workbench, 2-controller, 3-abrasive bin, 4-servo motor, 5-friction steel wheel, 6-screw guide linear module, 7-grating ruler, 8-fixture, 9-weighing sensor, 10-column, 11-electric valve, 12-balance hammer. DETAILED DESCRIPTION

[0039] like Figure 3 and Figure 4 As shown, an automated unglazed brick wear resistance tester comprises: a workbench 1, a controller 2, an abrasive bin 3, a servo motor 4, a friction steel wheel 5, a lead screw guide linear module 6, a grating ruler 7, and a fixture 8.

[0040] A controller 2, a servo motor 4, a friction steel wheel 5, a lead screw guide linear module 6, a grating ruler 7, and a fixture 8 are arranged on a workbench 1;

[0041] The driving shaft of the servo motor 4 is connected to the friction steel wheel 5 through a belt, so as to drive the friction steel wheel 5 to rotate;

[0042] The fixture 8 is installed on the slider of the screw guide linear module 2, and the grating ruler 7 is arranged beside the fixture 8 and connected with the slider of the screw guide linear module 2. The screw guide linear module 2 drives the fixture 8 to drive the test piece 100 and the grating ruler 7 to move toward the friction steel wheel 5 at the same time;

[0043] A feed port is provided below the abrasive bin 3, and the feed port is located directly above the friction steel wheel 5 in the tangential direction;

[0044] A weighing sensor 9 is also provided below the tabletop of the workbench 1. The weighing sensor 9 is connected to the abrasive bin 3 located above the friction steel wheel 5 through a column 10. The feed port below the abrasive bin 3 is connected to an electric valve 11.

[0045] The servo motor 4 , the screw guide linear module 6 , the grating ruler 7 , the weighing sensor 9 and the electric valve 11 are all connected to the controller 2 .

[0046] Operation process:

[0047] 1. Fix the unglazed brick specimen 100 to be tested on the fixture 8;

[0048] 2. Press the start button on the control panel of controller 2 and wait for the set time to start the unglazed brick wear resistance test. The waiting time is provided for the staff to stay away from the test equipment;

[0049] 3. The screw guide linear module 6 generates a fixed clamping force to drive the fixture 8 and the test piece 100 to move in the direction of the friction steel wheel 5 until the predetermined clamping force is generated against the friction steel wheel 5. In this process, the grating reading head of the grating ruler 7 also moves accordingly. When the grating reading head reading no longer changes, the current grating reading is recorded;

[0050] 4. The controller 2 reads the real-time weight of the weighing sensor 9 and uses the PID algorithm to control the automatically adjustable feed port to feed the abrasive at a speed of 1g / r;

[0051] 5. The controller 2 controls the servo motor 4 to drive the friction steel wheel 5 to rotate 150 revolutions at a constant speed;

[0052] 6. The controller 2 controls the friction steel wheel 5 to stop rotating and controls the feeding port to stop feeding. As the test piece 100 is ground, the reading of the grating ruler 7 changes. The reading of the grating ruler 7 at this time is read;

[0053] 7. The difference between the two grating ruler readings is the grinding depth, and the system automatically calculates the grinding volume;

[0054] 8. The controller 2 controls the lead screw guide linear module 6 to drive the fixture 8 and the grating reading head of the grating ruler 7 to return to the proximity switch and stop.

[0055] like Figure 5 As shown, the grinding chord length is automatically calculated by the grinding depth, and the grinding volume calculation formula is:

[0056]

[0057]

[0058] Where:

[0059] α——the central angle of the chord to the friction steel wheel, in degrees (°);

[0060] h——the thickness of the friction steel wheel, in millimeters (mm), the standard value is 10mm;

[0061] d——friction steel wheel diameter, in millimeters (mm), standard value is 200mm;

[0062] x——grinding depth, in millimeters (mm).

[0063] The utility model provides an automated unglazed tile wear resistance tester, which provides a stable abrasive feeding speed through the cooperation of an automatically adjustable feed port and a weighing sensor, meeting the national standard requirement of 100g / 100r±10g / 100r. Automatic measurement and calculation by a high-precision grating ruler replaces manual measurement and calculation by a vernier caliper, thereby improving the accuracy of the wear resistance test of unglazed tiles. A servo motor provides a stable friction steel wheel clamping force in a constant torque mode to replace the clamping force generated by the weight, thereby avoiding the influence of the abrasive on the weight of the weight and the influence of the horizontal angle of the friction force. The entire work process and test values ​​are automatically calculated to reduce the degree of personnel participation, improve efficiency, avoid manual calculation errors, and reduce the harm of abrasive dust to personnel health.

[0064] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. An automatic unglazed brick wear resistance tester, characterized in that: include: Workbench, controller, abrasive bin, servo motor, friction steel wheel, screw guide linear module, grating ruler, fixture; The controller, the servo motor, the friction steel wheel, the lead screw guide linear module, the grating ruler, and the fixture are arranged on the workbench; The driving shaft of the servo motor is connected to the friction steel wheel through a belt, so as to drive the friction steel wheel to rotate; The fixture is installed on the slider of the screw guide linear module, and the grating ruler is arranged beside the fixture and connected with the slider of the screw guide linear module, and is used to drive the fixture to drive the test piece and the grating ruler to move toward the friction steel wheel at the same time; A feed port is provided below the abrasive bin, and the feed port is located directly above the friction steel wheel in the tangential direction; The servo motor, the lead screw guide linear module, and the grating ruler are all connected to the controller.

2. The automatic unglazed brick wear resistance tester according to claim 1, characterized in that: A weighing sensor is also provided under the table top of the workbench, and the weighing sensor is connected to the abrasive bin located above the friction steel wheel through a column; the feed port under the abrasive bin is connected to an electric valve; the weighing sensor and the electric valve are both connected to the controller.

Images